Identifying Spatial Variability in Greenland's Outlet Glacier Response to Ocean Heat

摘要: Although the Greenland ice sheet is losing mass as a whole, patterns of change on both local and regional scales are complex. Spatial statistics reveal large spatial variability dynamic thinning rates Greenland's marine-terminating glaciers between 2003 2009; only 18% glacier co-vary with neighboring glaciers. Most spatially-correlated clusters stable in Thule, Scoresby Sund, Southwest regions. Conversely, where spatial-autocorrelation low, individual more strongly controlled by local, glacier-scale features than influences. We investigate possible sources control oceanic forcing combining grounding line depths ocean model output to estimate mean heat content adjacent 74 Linear regression models indicate stronger correlation compared those alone. The robust for all except West, strongest Southeast (coefficient determination 0.81), implying that deeper grounded termini here most sensitive changes forcing. In Northwest, accounting shallow sills regressions improves water depth glacial thinning, highlighting need comprehensive knowledge fjord geometry.